Prepare zend_ast_decl for reuse with classes
Partial port of class declarations
Mostly finish class declarations (~50 failing tests)
Port __TRAIT__ and __CLASS__ to AST
Pre-evaluate magic constants
Fix some remaining class declaration issues
Handle const expr __CLASS__ in trait
Dead code
Remove one usage of implementing_class
Remove __clone test (not reason it should error)
Port use statement
Drop dead code
Port function/const use
Fixed dtrace support
Fixed support for executor override
Port constant declaration
Partial NS port (semicolon, no errors)
Port top level stmt

Problem: namespace\foo no longer works :/
Fix namespace\, maybe
Code cleanup